Combination press and edge roller



June 3, 1958 w. CHUNDELAK, JR., ET AL 2,837,015

COMBINATION PRESS AND EDGE ROLLER Filed Jan. 31, 1955 3 Sheets-Sheet 1 5 I J, E IN V EN TOR-5 L 0111's W Ch un dela .IQIIP.

Theodore L. Sfou di June 3, 19 3 L. w. CHUNDELAK, JR, ET AL 2,837,015

COMBINATION PRESS AND EDGE ROLLER Filed Jan. 31, 1955 3 Sheets-Sheet 2 IN V EN TORS Louis WCh undejalqcfr. F. 2 BY Theodore L. Sfoudfl D D 7 June 1953 L. w. CHUNDELAK, JR, ETAL 2,837,015

COMBINATION PRESS AND EDGE ROLLER Filed Jan. 31, 1955 5 Sheets-Sheet 3 INVENTURS Louis W Chunde]ak,z7r:

BY Theodore Sioudi United rates COMBINATIDN PRESS AND EDGE ROLLER Application January 31, 1955, Serial No. 485,031

6 Claims. (Cl. 9336.5)

This invention has to do with a punch press and more particularly with a press which is capable of blanking and forming material, such as metal foil, into articles as well as rolling the sharp peripheral edges of the articles.

Punch presses for stamping out articles such as formed metal foil pans are known. The use of such pans as serving and cooking dishes has increased materially, particularly with the expansion of the market for pre-cooked frozen foods. Pans made, for instance, from aluminum foil have been found to be very satisfactory as the container means in which pre-cooked frozen pies, desserts and other edibles may be initially cooked, frozen, and later served. Such pans must be produced inexpensively, rapidly and in great quantities.

Known presses have produced pans satisfactorily with the exception that the pans were left with a sharp peripheral edge on the outwardly extending flange or lip. This sharp edge was unsuitable because the pan users were likely to cut or otherwise injure themselves and the pans could not be as readily handled. It has therefore been known that the peripheral edges of such pans had to be rolled to make them satisfactory. All known methods and apparatus involved a separate operation after stamping of the pan. This necessitated movement of the pans from one machine to another where they had to undergo a slow process of rolling their edges. Such procedure is not in keeping with high speed automatic production methods and produced an unnecessary delay and increase in cost of pans.

It is the object of the present invention to overcome this shortcoming of pan production by providing apparatus in the conventional punch press which will enable the peirpheral edges of pan flanges to be rolled in the punch press itself while the blanking and forming operation is being carried out. That is accomplished at a speed which will not reduce the normal high speed operation of such a press and when the pans are discharged from the press they are in completed condition ready for use.

The invention will now be explained in detail with reference to the following drawings in which:

Fig. l is a front elevation of a press according to the invention;

Fig. 2 is a cross section of the edge rolling mechanism of the press;

Fig. 3 is a section on lines 33 of Fig. 2;

Fig. 4 is a section on lines 4-4 of Fig. 2; and

Figs. 5, 6, 7 and 8 are cross sections of portions of the edge rolling mechanism showing successive steps in its operation.

Referring to the drawings, a standard open back punch press is shown which comprises a fly wheel 10 mounted on a main drive shaft 11. Connected in the usual operative manner to the drive shaft is a female die 12 mounted on a movable plate 13 slidably supported by bushings 14 on rods 15 which are upstanding from the bottom half of the die set or bed plate 16 of the machine. A male die 17 is positioned beneath the female die and roller means (not atent 0 2,337,915 Patented June 3, 1958 2 shown) are provided for feeding aluminum foil (not shown) between the male and female dies. When the press operates a disc of aluminum is cut out and formed into a pan 19 (Fig. 5) having a flange 20 with a sharp peripheral edge 2011, which is too sharp to permit satisfactory use of the pan.

By means of an air jet hereafter described, the pan is transferred from stamping position into position where its edges are rolled.

The edge rolling apparatus in the press comprises a clamping hood 21 (Fig. 2) which is supported from a piston 22 slidably mounted in plate 13. A cross member 23 is fastened to the upper end of piston 21 and is also connected to a pair of upstanding coil springs 24 surrounding bolts 25 in plate 13. Hood 21 is adapted to cooperate with a supporting plate 26 on which pan 19 is positioned. Plate 26 is supported by a central spindle 27 whose free end 23 has a collar 29 which limits the upward movement of the spindle in cut out area 36 provided in member 31 which surrounds spindle 2'7. A coil spring 32 surrounding the other end of the spindle in cut out area 33 tends to urge plate 26 into horizontal alignment with transfer table 34. Member 31 is fastened by screws 35 and angles 36 to bed plate 16.

A lever arm assembly 33 (Fig. 1) connected to a cam 39 operated from the main driving shaft is pivoted at 49 (Fig. 2) and the end of rod 41 engages an assembly generally indicated at 42 which is vertically movable around member 31. Assembiy 42 comprises a plate 43 supporting a plurality of upstanding pins 44 which fit into a ring 45 surrounding member 31. Ring 45 carries the inner race of a ball bearing ring 46 whose outer race carries a plate 47 having a cammed surface 48. Surface 48 is adapted to be engaged by a complementarily sloped cam follower or finger 49 extending from slide 50 (Fig. 3) mounted on a pulley Wheel 51 by brackets 52 which provide a guideway for the slide. The brackets are fastened to the pulley wheel by screws 53. An elliptical hole 54 is provided in slide 59 to permit movement of the slide around nut 31a. Pulley wheel 51 is supported by ball bearing ring 55 around the upper portion of member 31 and a hole 56 (Fig. 4) through the wheel accommodates finger 43. As seen in Fig. 2, finger 49 extends sufiiciently far through wheel 51 so as to engage plate 47 either in raised or lowered position. Members 47, 59 and 51 are therefore all keyed together by finger 49.

At one end of slide an edge rolling or spinning device generally indicated at 57 is mounted. The spinning device is adapted to be moved laterally into position shown in solid lines Fig. 2 to engage pan flange 20 and as the spinning device is rotated about the pan its edge is rolled inwardly. The spinning device comprises a grooved roller 58 having an inside threaded bushing 59 fastened by bolt 64] to supporting plate 61 which is mounted on slide 50 by screws 62. The peripheral edge of the pan flange is adapted to set in notch 63 in roller 58.

A motor 64 (Fig. l) which is continually running once the machine is put in operation drives a wheel 65 on which is mounted a belt 66 which rotates wheel 51 which carries the spinning device around the pan.

When clamping hood 21 is in raised position, assembly 42 is in lower position shown in dotted lines Fig. 2 and spinning device 57 is moved to the right by centrifugal force and out of engagement with the pan flange. At the correct moment in the operation of the press when a pan has been positioned on supporting plate 26 the clamping hood is operated to depress supporting plate 26. When plate 26 is pushed down, cam 39 operates lever 38 and assembly 42 is raised. Cammed complementary surfaces 48 and 49 engage and slide 50 is .movcd to the left whereby notch 63 of the roller engages edge 20a to perform the rolling operation.

The positioning and ejection of material from the machine is accomplished bymeans. of a plurality of air jets which are controlled by cams on main drive shaft 11. The cams sequentially open and close the desired air streams at the required times as the press operates.

As soon as'a blankrof foil'has been cut and formed into a pan, valves 70, 71 are opened by cams 72, 73 and air is permitted to pass through conduits 74,75 to nozzles 76, 77 which blow the scrap material out theback of the machine. Immediately thereafter cam 78 opens valve v179-;and air passes through conduit 80 and nozzle 81 to move the p'anlaterally from stamping position into edge rolling position. Cam 82 is also operated to open valve 83 and air from conduit 84 which passes through piston :22 is directed vertically against the'pan' to hold it in edge 'prolling position. Cam85 is then operated to open valve .86 andair passes'through conduit'87 to nozzle 88 for fine positioning of the pan.-. The vertically directed spurt of air-from conduit 8 4 stops-the lateral movement of a pan imparted to it by the spurt of air from nozzle 81. Air from=nozzle88 is alsodirected downwardly and sidewardly at an angle of about 45 against a pan which has been stopped by air from conduit 84.. The air from nozzle 88 is directed soias to insure proper final positioning of a pan in edge rolling position just prior to clamping hood, 21 engaging the pan. After the pans edges have been rolled cam 89 opens valve 90 and air passes through conduit 91 to nozzle 92 to eject the completed pan out the front of the machine. The air valves, of course, are adjusted to permit passage of the correct amount of air for each operation. A fence 93 is provided around a portion of the back and side of the press to prevent a pan from being blown out the press.

The sequence of operation of the spinning device is more clearly shown in Figs. -8.

In Fig. 5 the pan has just come to rest on supporting plate 26 and clamping hood 21 is starting to move downwardly. Spinning device 57 is out to'the right in nonoperative position which is the position in which it is held by centrifugal force .as wheel 51 rotates.

In Fig. 6 hood 21 has engaged the flange and is holding itiagainst the supporting plate.

In Fig. 7 the hood hasdepressed plate 26 and the pan into alignment with the spinning device which is in the process of being moved to the left towards edge The pan is now positioned for edge rolling.

In Fig. 8 the spinning device has been moved into engagement with the edge of the flange and rolled it back.

.As soon as this is accomplished the parts return to their positions shown in Fig. 5 and the completed pan is ejected from the press.

While'a preferred embodiment of the invention has been illustrated and described, it will be appreciated by those skilled in the art that various modifications and changes may be made without departing from the scope .of the invention and it is intended to limit the invention 4 l the guideway, a first ball bearing ring supporting the wheel around the spindle, a motor, a belt connected to the motor for driving the pulley wheel, a spinning roller mounted at one end of the slide in cooperative relation with the edge of the article, a cam follower extending from the slide through the wheel, a cammed plate adapted to be engaged by the follower, a ring and secondball bearing ring for supporting the cammed plate around the spindle, a vertically movable plate beneath the spindle, a plurality of upstanding pins from said last mentioned plate supporting said ring and second ball bearing ring, a lever arm actuated by the press whereby said cammed plate and follower may be brought into engagement to move the spinning roller inwardly to engage the edge of the article. I

2. in combination with a punch press for stamping pans from metal foil, means for blanking and forming from said foil a pan having a sharp edged flange, a plu- .rality of conduits for directing jets of airiinto predeterholding it against the support, a rotatable wheel, means for rotating the wheel, a slide laterally movable in a guideway'on the wheel, a spinning roller mounted at one end of the slide in cooperative relation with theedge of the pan, a cam plate beneath the wheel, a-fingerprojecting from the slide through the'wheel and'adapted to be engaged by said cam, a lever arm operatively connected to'the machine, a plate with a pair of upstanding pins adapted to be moved vertically by said lever arm,.a ring connected to said pins, a ball bearing ring connected to said ring and to said cam plate whereby when said lever arm-is actuated the cam plate engages the finger to move the spinning roller inwardly against centrifugal force and into engagement with the edge of the pan to roll the edge,

.whereupon the hold down member is released, and means for operating another of said air jetsto eject the com-- pleted pan from the machine.

3. The machine according to claim 2- and in which the pan support has a central spindle, a spring surrounding a portion of the spindle and adapted to restrain downward movement of the support. Y

4. The machine according to claim 2 and in which a plurality of cams are connected to the machine for controlling sequential operation of the jets of air.

5. The machine according to claim 2 and in which the spinning roller comprises a grooved roller having a notch for receiving theedge of the pan and a bolt for fastening 1 i 6. The machine according to arate from that ofthe machine forcontinually driving the roller to the slide.

claim 2 and a motor sepsaid wheel.

References Cited in the file of this patent UNITED STATES PATENTS 

